Mubadala Citi DC Open: Liudmila Samsonova vs Madison Keys

Platform comparison

Market context

The Mubadala Citi DC Open is a WTA 500 hardcourt tournament held annually in Washington, DC. This market concerns a first-round match scheduled for 27 July 2026 between Russian player Liudmila Samsonova and American player Madison Keys. A YES share represents a bet that Samsonova advances; a NO share represents a bet that Keys advances. The current crowd-implied probability of 13% for a Samsonova victory reflects strong confidence in Keys, though this figure will shift as match day approaches and new information emerges.

Samsonova has demonstrated inconsistency across hardcourt surfaces, with her career record against top-50 opponents on hard courts sitting below 40% in recent seasons. Keys, by contrast, has performed reliably at the DC Open, reaching the final in 2019 and maintaining a winning record at the venue. The 13% probability aligns with historical patterns favouring the American player in this matchup and on this surface, though Samsonova's occasional peak performances—notably her 2022 run to the Australian Open semi-finals—suggest upside risk remains priced in.

Traders should monitor injury reports and practice schedules released in the week preceding 27 July, as both players' fitness status directly influences match outcomes. Keys' recent hardcourt form and any late-tournament withdrawals from the draw will clarify field strength. The settlement window closes at 14:00 GMT on 3 August 2026, allowing seven days beyond the scheduled date for completion; matches delayed beyond this window or ending without a winner resolve to 50-50.

Methodology

We track Mubadala Citi DC Open: Liudmila Samsonova vs Madison Keys across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Market UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Market UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.